Demi Lovato wishes she were there more for her younger sister during the early days of both their careers! The 33-year-old singer appeared on the Las Culturistas podcast on Wednesday, where she expressed regret for not being "protective" enough of her sibling Madison De La Garza when she starred in Desperate Housewives. For those who don't remember, Madison played Juanita Solis, the young daughter of Eva Longoria's character Gabrielle, from 2008 to 2012.